﻿using System.Windows.Input;

namespace SelfServiceReportPrinter.Commands;

public class RelayCommand<T> : ICommand
{
    private readonly Predicate<T> _canExecute;
    private readonly Action<T> _execute;

    public RelayCommand(Action<T> execute) : this(execute, null)
    {
    }

    public RelayCommand(Action<T> execute, Predicate<T> canExecute)
    {
        if (execute == null)
            throw new ArgumentNullException("execute");
        _execute = execute;
        _canExecute = canExecute;
    }

    public event EventHandler? CanExecuteChanged
    {
        add { CommandManager.RequerySuggested += value; }
        remove { CommandManager.RequerySuggested -= value; }
    }

    public bool CanExecute(object parameter)
    {
        return _canExecute == null ? true : _canExecute((T)parameter);
    }

    public void Execute(object parameter)
    {
        _execute((T)parameter);
    }
}

